scholarly journals Тонкая структура ридберговских экситонов в закиси меди

2018 ◽  
Vol 60 (8) ◽  
pp. 1515 ◽  
Author(s):  
М.А. Семина

AbstractIn 1952, E.F. Gross and N.A. Karryev discovered excitons of big radius also called the Wannier–Mott excitons. Their energy spectrum, response to external electric and magnetic fields, and also elastic deformations of a crystal were extensively studied in the 1960s–1970s. The second wave of interest to excitons in Cu_2O crystals appeared comparatively recent, in 2014, after the “giant” highly excited exciton states had been observed in this material. A theoretical description of highly excited exciton states needs, as a rule, new approaches, because, for such states, a deviation from the exactly solved hydrogen-like model becomes substantial and a numerical solution of the Schrödinger equation with allowance made for the features of the crystal energy band structure becomes extremely resource consuming. This report is a brief review of recent theoretical and experimental studies of the fine structure of the exciton energy spectrum in copper protoxide.

2012 ◽  
Vol 44 (2) ◽  
pp. 75-93
Author(s):  
Peter Mortensen

This essay takes its cue from second-wave ecocriticism and from recent scholarly interest in the “appropriate technology” movement that evolved during the 1960s and 1970s in California and elsewhere. “Appropriate technology” (or AT) refers to a loosely-knit group of writers, engineers and designers active in the years around 1970, and more generally to the counterculture’s promotion, development and application of technologies that were small-scale, low-cost, user-friendly, human-empowering and environmentally sound. Focusing on two roughly contemporary but now largely forgotten American texts Sidney Goldfarb’s lyric poem “Solar-Heated-Rhombic-Dodecahedron” (1969) and Gurney Norman’s novel Divine Right’s Trip (1971)—I consider how “hip” literary writers contributed to eco-technological discourse and argue for the 1960s counterculture’s relevance to present-day ecological concerns. Goldfarb’s and Norman’s texts interest me because they conceptualize iconic 1960s technologies—especially the Buckminster Fuller-inspired geodesic dome and the Volkswagen van—not as inherently alienating machines but as tools of profound individual, social and environmental transformation. Synthesizing antimodernist back-to-nature desires with modernist enthusiasm for (certain kinds of) machinery, these texts adumbrate a humanity- and modernity-centered post-wilderness model of environmentalism that resonates with the dilemmas that we face in our increasingly resource-impoverished, rapidly warming and densely populated world.


2021 ◽  
Vol 45 (1) ◽  
pp. 1-25
Author(s):  
Steven Ruggles

AbstractQuantitative historical analysis in the United States surged in three distinct waves. The first quantitative wave occurred as part of the “New History” that blossomed in the early twentieth century and disappeared in the 1940s and 1950s with the rise of consensus history. The second wave thrived from the 1960s to the 1980s during the ascendance of the New Economic History, the New Political History, and the New Social History, and died out during the “cultural turn” of the late twentieth century. The third wave of historical quantification—which I call the revival of quantification—emerged in the second decade of the twenty-first century and is still underway. I describe characteristics of each wave and discuss the historiographical context of the ebb and flow of quantification in history.


Author(s):  
Amanda C. Seaman

This chapter traces the literary history of Japanese women writing about pregnancy and childbirth, focusing on two key figures in this development. The first is Meiji-era poet Yosano Akiko whose works explored her experiences as an expectant mother and highlighted the unsettling aspects of pregnancy. While Yosano’s works permitted the literary treatment of formerly taboo issues, later writers rejected her lead, instead treating pregnancy as the prelude to motherhood, as a quasi-sacred moment. This persisted until the 1960s and 70s, when writers influenced by second-wave feminism challenged patriarchal society, rejecting the roles of wife and mother. The second was Tsushima Yuko, whose novels and stories explored alternative, mother-centered family models. Since then, writing about pregnancy rests on these two authors: on one side, treatments of pregnancy that emphasize the alien and the disquieting, and on the other, more ironic works, focusing upon the self-assertive and individualistic nature of childbearing.


Author(s):  
Maya Montañez Smukler

Elaine May began her career as a filmmaker during the 1970s when the mythology of the New Hollywood male auteur defined the decade; and the number of women directors, boosted by second wave feminism, increased for the first time in forty years. May’s interest in misfit characters, as socially awkward as they were delusional, and her ability to seamlessly move them between comedy and drama, typified the New Hollywood protagonist who captured America’s uneasy transition from the hopeful rebellion of the 1960s into the narcissistic angst of the 1970s. However, the filmmaker’s reception, which culminated in the critical lambast of her comeback film Ishtar in 1987, was uneven: her battles with studio executives are legendary; feminist film critics railed against her depiction of female characters; and a former assistant claimed she set back women directors by her inability to meet deadlines. This chapter investigates Elaine May’s career within the lore 1970s Hollywood to understand the industrial and cultural circumstances that contributed to the emergence of her influential body of work; and the significant contributions to cinema she made in spite of, and perhaps because of, the conflicts in which she was faced.


2009 ◽  
Vol 56 (2) ◽  
pp. 189-201 ◽  
Author(s):  
Alfonso Pérez-Agote

The process of the secularization of consciences in Spain evolved in three stages. The first of these began in the 19th century and lasted until the Civil War (1936—1939). This stage was characterized by the growth of a series of movements that opposed the Catholic Church's presumptive monopoly on truth. The second wave corresponded to the spread of consumerism and lasted from the 1960s to the end of the 1980s. In this second stage, we see a loss of interest in the Catholic Church and religion. Spain, traditionally a Catholic country, steadily became a country of Catholic culture; this translated into a progressive decline in the ability of the Church to control social behaviour. A third wave began in the 1990s, since when the majority of the younger generation has been losing all contact with the Catholic Church and religion.


2019 ◽  
Vol 27 (3) ◽  
pp. 253-269
Author(s):  
Mary Grey

In her paper Expelled Again from Eden: Facing Difference through Connection, delivered in Plymouth in 1998, Mary Grey said the story of the Garden of Eden was a dilemma for Feminist Theologians. This because it both bears responsibility for the Fall of relationship between God and Man and the misogyny that has ensued through the ages but also underpinning the desire to return to a supposed golden age of matriarchy with the re-emergence of the Goddess and a related ecological and egalitarian epoch of harmony. Grey makes a connection between the Lost Garden myth and the second wave feminist ideal of global sisterhood of the 1960s. Reflecting on her paper and updating it later, Grey concluded she still felt the challenge of years ago: the sense of rightness of connection and mutuality, yet the crucial need to embrace difference.


1996 ◽  
Vol 8 (1) ◽  
pp. 144-165 ◽  
Author(s):  
Martha F. Davis

The year 1966 is often cited as the start of the “second wave” of the organized women's movement, marked by the formation of the National Organization for Women (NOW). However, 1966 also marked the formal inception of another, less enduring group of women activists, the National Welfare Rights Organization (NWRO), linked to a separate but related social movement focused on welfare rights. From 1966 to 1975, NWRO coordinated welfare mothers' activism to shore up public assistance for the poor and to establish a federally guaranteed annual income. At its height in 1968, NWRO claimed twenty thousand members nationwide and dozens of local chapters from California to New York.


Author(s):  
D. Segal ◽  
P. Kral ◽  
M. Shapiro

This article presents a detailed theoretical description of tubular image states (TIS) around different tube geometries, along with their applications. It begins with a discussion of the theoretical background for the existence of TIS in conjunction with infinitely long homogeneous carbon nanotubes, finite and inhomogeneous nanotubes, and nanotubes arrays. It then considers the lifetimes and stability of TIS, along with the states’ tunability by external fields and the onset of chaos in TIS. In particular, it examines how TIS can be manipulated by means of electric and magnetic fields. It also describes nano-Paul traps of single electrons based on TIS and concludes with an assessment of recent experiments on TIS.


2010 ◽  
Vol 10 (3) ◽  
pp. 1401-1402 ◽  
Author(s):  
E. Lindborg ◽  
K. K. Tung ◽  
G. D. Nastrom ◽  
J. Y. N. Cho ◽  
K. S. Gage

Abstract. Recently, Lovejoy et al. (2009) argued that the steep ~k−3 atmospheric kinetic energy spectrum at synoptic scales (≥1000 km) observed by aircraft is a spurious artefact of aircraft following isobars instead of isoheights. Without taking into account the earth's rotation they hypothesise that the horizontal atmospheric energy spectrum should scale as k−5/3 at all scales. We point out that the approximate k−3-spectrum at synoptic scales has been observed by a number of non-aircraft means since the 1960s and that general circulation models and other current models have successfully produced this spectrum. We also argue that the vertical movements of the aircraft are far too small to cause any strong effect on the measured spectrum at synoptic scales.


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